The garage is designed to protect the car from hijackers and adverse weather conditions. However, the wrong microclimate in the garage can cause stagnation of dirty, stale air, increased humidity and poor health of the car owner. A hood in the garage will help to avoid the occurrence of such unpleasant phenomena. Most car owners equip ventilation with their own hands, however, before you begin such work, you need to know how to do it right.
Why do you need a hood in the garage?
Many people believe that ventilation is not necessary in a non-residential building. However, the presence of a hood for the garage is necessary, since its absence can lead to such consequences:
- with increased humidity, moisture settles on the metal parts of the body, electronic devices and parts of the car, which leads to corrosion and mold and mildew inside and outside the passenger compartment. In addition, the racks and tools available in the garage also become unusable from time to time;
- lack of ventilation contributes to the accumulation of exhaust gases and products of vaporization of gasoline or diesel fuel in the room. This can cause deterioration of health, the occurrence of headaches, and even poisoning.
Types of ventilation
The garage can be arranged in the basement or on the street. The options for equipping the ventilation system in both cases are almost the same, however, basement and semi-basement garages must be equipped with special exhaust systems, since air circulates poorly in such rooms, resulting in unpleasant odors and dampness. The photo shows the option of organizing ventilation in the basement:
There are three ways to organize a ventilation system:
- Natural.
- Forced.
- Mixed.
Natural. This type of ventilation is carried out by circulating air through slots in the gates and windows, as well as through special ventilation openings.
Forced. To equip the garage with forced ventilation, the ventilation openings are equipped with special devices that facilitate the quick and efficient removal of dirty air from the room and provide fresh access.
Mixed. It is a natural ventilation in combination with exhaust ventilation, when the garage is equipped with a special exhaust hood to exhaust the dirty air.
It was established by SNiP norms that the volume of fresh air entering the garage should be 180 liters per hour, and during the day the air should completely change 6-10 times.
DIY hood organization
When arranging a hood for a garage with your own hands, it must be borne in mind that the pipes used can be made of metal, plastic or asbestos. Moreover, their diameter will depend on the volume of air that needs to be replaced. According to current standards, a diameter of 15 mm is required per 1 m². For example, to equip a garage with an area of 10 m², pipes with a cross section of 150 mm should be used.
To make ventilation yourself, you need to prepare:
- metal grilles;
- Pipes for 100-200 mm;
- exhaust fans;
- grinder;
- hammer drill;
- sealant.
DIY installation process
- First of all, it is necessary to organize natural ventilation in the garage. For this, the following calculation is performed: for example, the size of the garage is 6: 4 m, and its area, respectively, 24 m². Since 1 m² of area requires a diameter of 15 mm, multiply 24 m² by 15 mm. As a result, the diameter of the ventilation ducts is 36 cm.However, the obtained value is relevant only if the garage is equipped with only one supply air exhaust and one supply air duct. In the presence of two hoods, the obtained value (36) should be divided into two.
- Having calculated what diameter the pipes should be, holes of the corresponding size are made in the walls of the garage using a puncher. Inflow holes are made at a height of about 15 cm above the floor.
- Exhaust openings should be located on the opposite wall below the ceiling level by about 10-15 cm. Next, a pipe is inserted into the hole made, which is discharged above the roof level by 50 cm or more. The intensity of air exchange depends on the length of the pipe protruding above the roof: the higher it is, the more efficient the air exchange inside the garage will be.
- The holes that remain between the pipes and the walls must be filled with sealant. To protect the duct from the entry of debris, foreign objects and rodents, metal grilles are used to close the ends of the pipes. Small domes are used to protect the upper pipe from rain and snow.
- When the arrangement of natural ventilation is ready, it is necessary to equip the exhaust ducts with fans. At the same time, only a hood for the garage is equipped with fans, and air will flow naturally into the supply air holes. When purchasing fans, it is advisable to choose models that work as quietly as possible, since during operation of the exhaust system, too loud fans will interfere with the car owner. The photo shows an exhaust device used to ensure efficient and rapid outflow of air:
It should be noted that the air inlets can be made not in the wall of the garage, but at the bottom of the gate. To do this, holes are made in the gate, which are closed with metal grates. The size of the holes should be 2-3 times larger than the diameter of the exhaust pipe.
To accelerate the process of removing air, you can use defletcor. Thanks to this device, mounted in the duct, low pressure is created, which contributes to a faster and more efficient removal of dirty air from the room. To prevent condensation from forming on the deflector, it must be equipped with thermal insulation.
Cooker hood
Many car owners use a viewing hole not only for repairs, but also for storing keys, fuel, oil, tools. In addition, for convenience, many pits are equipped with electric lighting. Therefore, it is also necessary to maintain the correct microclimate in the pit.
A hood for a garage differs from a hood for an inspection pit in that there is no need to equip the latter with fans. To maintain the correct humidity level in it, it is enough to install two pipes in the corners. One of them should be located very low at the bottom of the pit, and the other in the opposite corner at a height of 10 cm from the upper level of the pit. To protect the duct from debris, its ends are equipped with special grilles.
It should be remembered that in winter a large amount of moisture is released from the inspection hole into the garage, which practically does not evaporate due to the cold. Therefore, experienced car owners always in the cold season dig a hole with wooden boards.
Neglect of such a moment as the organization of a hood for a garage can lead to rather unpleasant consequences. Therefore, each car owner should know how to make a hood in the garage with their own hands, how to correctly calculate the amount of air that should enter the room, and what diameter pipes should be used.
